AUTHOR=Yabing Li , Peng Chen , Chubin Lin , Meilan Chen 

TITLE=Development, Validation, and Application of the Turbulent Combustion Model for 3D CFD Code CYCAS

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.872452

DOI=10.3389/fenrg.2022.872452

ISSN=2296-598X

ABSTRACT=The CYCAS code is a 3D CFD code developed independently by China Nuclear Power Research Institute, aiming at hydrogen safety analysis in containment. In order to equip the CYCAS code with the capability of combustion analysis, a combustion model is screened, developed, and validated with two cases from International Standard Problems. Then a containment combustion analysis is conducted as an engineering application to demonstrate the capability of CYCAS in evaluating the pressure and thermal load of combustion. Firstly, the mature and widely-used combustion model, i.e. the Burning Velocity Model (BVM) with Zimont correlation is developed for the CYCAS code in this study. There into, the lamiar flame speed correlation for CYCAS is screened based on the containment atmospheric condition during accidents. Then two cases from THAI facility are calculated to validate the model. Result show that the combustion model in CYCAS manage to have reasonable prediction on the slow deflagration for gas mixture both with and without steam. Finally, a containment combustion analysis is conducted with the initial hydrogen distribution calculated from a postulated accident. The analysis shows that the CYCAS manage to calculate the pressure and thermal load of the combustion to evaluate the influence of the combustion on the containment integrity and equipment survivability.